Exchange Trusted Subsystem is not member of the local administrator group

When designating a non Exchange 2010 or Exchange 2013 servers as a file share witness, you have to assign the Exchange Trusted Subsystem as a member of local administrator group on the file share witness server.

Even if you assign the Exchange Trusted Subsystem as a member of local administrator group on the file share witness server, you may get the below warning



There is no need to find a fix for the above warning, because Microsoft informed this warning is normal and we can silently ignore it. for more info